Akademik Veri Yönetim Sistemi
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.40, sa.1, ss.287-295, 2024 (SCI-Expanded)
In this study, polyvinyl alcohol (PVA)/Na-Bentonite composites were prepared. In the preparation of composites, a maximum of 13% polymer by mass was loaded into the clay. Structural properties of composites prepared by solution mixing technique were examined using X-ray fluorescence spectrometry (XRF), Fourier Transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) techniques. Dielectric properties were determined with the help of Dielectric spectroscopy (DS). From the XRF study, it was understood that the origin of the clay was Calcium bentonite (Ca-Bentonite) provided from the Asbro-Horio reservoir on the island of Milos, Greece, and that the Supplier (Imerys-Türkiye) converted the clay into Na-Bentonite through the sodium enrichment process. From XRD and FTIR measurements, it was observed that PVA interacted with the Na-Bentonite surface instead of being located between the Na-Bentonite galleries. This interaction between polymer and clay limited both the segmental movement of the polymer chains and the orientation of the hydroxyl groups on the clay surface. The electrode polarization effect is significantly reduced in composites with low PVA content. In low-dimensional capacitive systems, the use of materials with low dielectric constant comes to the fore to prevent resistance-capacitance (RC delay) delay. The important factor affecting the dielectric constant in the low frequency region is the electrode polarization effect. Thus, the low electrode polarization effect composites produced in this study can serve this purpose.